Table 2.
Numbers (percentages) of cases of pneumonia and controls according to main risk factors
| Risk factor | Cases (n=152) | Controls (n=2391) |
|---|---|---|
| Sex: | ||
| Male | 81 (53) | 1197 (50) |
| Female | 71 (47) | 1194 (50) |
| Age (days): | ||
| 30-89 | 47 (31) | 649 (27) |
| 90-179 | 62 (41) | 644 (27) |
| 180-364 | 43 (28) | 1098 (46) |
| Social class*: | ||
| Bourgeois (all categories) | 26 (17) | 499 (21) |
| Atypical proletariat | 39 (26) | 1034 (43) |
| Typical proletariat | 42 (27) | 518 (22) |
| Subproletariat | 30 (20) | 174 (7) |
| Family income (No of minimum wages per month†): | ||
| ⩽1 | 34 (22) | 415 (17) |
| 1.1-3 | 72 (47) | 1103 (46) |
| >3 | 46 (30) | 873 (36) |
| Maternal schooling (years): | ||
| 0 | 6 (4) | 63 (3) |
| 1-4 | 67 (44) | 557 (23) |
| 5-8 | 65 (43) | 1153 (48) |
| ⩾9 | 14 (9) | 618 (26) |
| Maternal age (years): | ||
| <20 | 35 (23) | 358 (15) |
| 20-24 | 41 (27) | 719 (30) |
| 25-29 | 35 (23) | 633 (26) |
| 30-34 | 26 (17) | 438 (18) |
| ⩾35 | 15 (10) | 243 (10) |
| Parity: | ||
| 0 | 42 (28) | 849 (35) |
| 1 | 30 (20) | 663 (28) |
| 2 | 26 (17) | 465 (19) |
| ⩾3 | 54 (35) | 414 (17) |
| Weight gained during pregnancy: | ||
| <10 kg | 82 (54) | 1584 (66) |
| ⩾10 kg | 70 (46) | 807 (34) |
*
Bourgeois (all categories) includes professionals, owners of large businesses, owners of small businesses, and shopkeepers; atypical proletariat is equivalent to non-manual workers in regular employment, typical proletariat to manual workers in regular employment, and subproletariat to unemployed and casual workers.
†
Around $100 in 1993.